Arkady's macro works for Wordfast too. A Wordfast segmented document looks remarkably similar to a Trados segmented document. That was part of the reasons for Wordfast's instant popularity.
When you close the open segment, the cursor (and the page view) will go to the beginning of the next segment. If you cannot close it because it is corrupted, you can use the search function of Word to search for the color formatting of an open segment.
Gracielas Macro probably won't work here, because it is meant for Trados segments, not Wordfast.
[Edited at 2004-11-02 15:00]